<span>1. It creates a pressure gradient when it contracts by increasing the volume of the lungs, which decreases the pressure in the lungs.
Looking at the ideal gas equation, you can conclude that volume is inversely related to the pressure. Increasing volume of lungs will result in a decrease in the pressure of the lungs.
2. When the pressure in the lungs, or the intrapulmonary pressure, falls below atmospheric pressure, air enters the lungs via inspiration.
If the lungs pressure keeps decreasing, eventually it will fall below the atmospheric pressure. Air moves from higher pressure into the lower pressure area. This will cause the air outside come inside the lungs. The event is called inspiration.
3. During forced inspiration, other muscles called external intercostals assist in the process.
Other than </span>the diaphragm,<span> the external intercostals could also assist in the inspiration. External intercostals will expand the chest outward, while the diaphragm pulls the lung. Both of them will cause decreased pressure in the lungs.
4. The process of expiration is largely passive due to the lungs’ elastic recoil.
Unlike the inspiration, expiration is mostly passive. The chest wall is made of ribs that connected with elastic connective tissue. The tissue is stretched at inspiration and when then muscle that causes inspiration relax, the connective tissue elastic force will press the chest wall.
5. This causes the volume of the lungs to decrease, which increases intrapulmonary pressure.
The pressure from the elastic tissue causing the lungs shrink. As the volume is inversely related to the pressure, the decreased volume will result in increased pressure.
6. When intrapulmonary pressure is higher than atmospheric pressure, expiration occurs.
The pressure of the lungs keep increases and eventually, it reaches a point where the pressure is higher than the atmospheric pressure.
</span>Air moves from higher pressure into the lower pressure area so the air inside the lungs will be forced to flow outside. The event is called expiration.<span>
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Answer:
THE FOLLOWING ARE TRUE;
1. CONJUGATION IS A TYPE OF REPRODUCTION
2. CONJUGATION INCREASES THE GENETIC DIVERSITY OF BACTERIA
3. FISSION CAN OCCUR AS OFTEN AS ONCE EVERY HOUR UNDER IDEAL CONDITIONS
Explanation:
Conjugation is a form of reproduction in bacterial cells in which cells transfer DNA by direct contact with the recipient cell. The process is mediated by plasmids which are non-chromosomal DNA molecules. Conjugation occurs in one direction because the donor cell is the only one with the conjugate plasmids. The donor cell sends out its sex pilus and attaches it to the recipient cell creating a conjugal bridge from which genetic materials can be transferred between the two cells. The bacterial chromosomes can also be transferred through conjugation. Conjugation allows for genetic diversity in bacterial cells because the transfer is unilateral and non-identical daughter cells are produced.
Fission of bacterial cells involves the splitting of the bacterial DNA that is replication, then the bacterial cell elongates and later split into two daughter cells with identical DNA. Fission in bacteria can take place every twenty minutes or often every hour under ideal and optimum conditions and a bacteria can produce a generation in just few hours.
During fission a conjugation tube is not formed, conjugation tube is formed during conjugation type of reproduction of bacterial cells and also conjugation does not produce genetically identical daughter cells because wide varieties of DNA or genes can be transferred resulting in bacteria with traits of several different species.
Answer:
gram and peas
Explanation:
The endosperm is not present in all given mature seeds except gram and peas.
In waves because sound echoes. Waves are the only form of energy that can echo.
The environment and the inside of the cell will have the same concentration. If the cell is placed in a solution of a less sucrose solution, the water will get into the cell making it bigger in size. The movement of the water is from a portion of lower concentration to a portion of higher sucrose concentration.